What causes gear oil to smell?

Tiny
GANDHI
  • MEMBER
  • 2006 TOYOTA SIENNA
  • 3.3L
  • 6 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 249,525 MILES
1. What is causing gear oil is smelling?
2. How many miles will it take before I change the gear oil?
Thursday, August 10th, 2023 AT 9:58 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,401 POSTS
Hi,

Gear oil has a bad smell to it all the time. LOL As far as replacing it, the manufacturer recommends doing it every 30K miles or 36 months (whichever comes first).

Now, I have a question. You indicated this is a 2-wheel drive. Therefore, it won't have a rear differential. Where are you finding gear oil? If it is an AWD vehicle, then it would be the rear differential. Please confirm.

Let me know.

Take care,

Joe
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Thursday, August 10th, 2023 AT 8:28 PM

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